Suspected separatists threw a grenade in a crowded market in the main city of India's restive northeast on Thursday, killing one person and wounding five, police said, two days after a string of similar blasts. Police blamed the attack in Guwahati in Assam state on the separatist United Liberation Front of Asom (ULFA), which last week spurned an offer for peace talks made by Prime Minister Manmohan Singh. "I heard a loud sound and immediately people were running in panic. Later, when I came back, I saw blood on the road," Lal Singh, who was at the city market, told Reuters. Police also blamed ULFA, which is fighting for independence for oil-and-tea-rich Assam, for six grenade attacks on Tuesday which killed three people and wounded 80. Last week, ULFA chief Paresh Barua had said in a statement the group would not accept Singh's appeal to give up arms and take part in talks, saying the call to abjure violence before dialogue was a pre-condition. --More 1815 Local Time 1515 GMT